- A lot has changed since Gray Line, one of the world's largest tour organizations, began operating locally over 90 years ago. Back then there was no Harbor Bridge or Opera House; today, sightseeing highlights include a tour of the Olympic venues, and excursions to the Blue Mountains, Southern Highlands or Hunter Valley. Tours take place aboard deluxe, air-conditioned coaches and are sometimes combined with harbor cruises. Spanish and Italian-speaking visitors can take one of Gray Line's specialized tours and receive personal commentary, via headsets, from multilingual guides.
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